Device for pulling bolts and pipes.



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4 Paten Jan. `29 1918.

A-.-L.`Amnnw's.` DEVICE FOR PULLING BOLTS AND PIPES.

APPLICATION FILED MAY123. I9I6- I I I Patented-Jan. 29,1918.

2 SHEETS-.SHEET 2.

NiTEr STATES PATENT oEEioE. f

ALBERT L. ANDREW-s, or wYivioRE, NEBRASKA.

T 0 all whom t may concern:

Be it known that I, ALBERT L. ANDREWS, a citizen of the United States, residing at lVymore, in the county of Gage and State of Nebraska, have inventedcertain newv and useful Improvements in Devices for Pulling Bolts and Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will .en able others skilled in the art to which it appertains to make and use the same.

The invention relates to a device for pulling bolts, pipes and the like.

rlhe object of the present invention isrto improve the construction of lifting jacks andto provide a simple, practical and comparatively inexpensive device designed for pulling'bolts, pipes and the like and capableof easy operation and of exerting greatforce in pulling a bolt or. extracting a pipe from a well or the like and adapted alsolto se-y curely grip the object operated on so that there will be no liability of the bolt, pipe or the like slipping. y

With these and other objects in view, the invention ,consists inthe 4construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended; it being understood that various changes inthe form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings Figure 1 is a central vertical sectional view of a bolt pulling device constructed in accordance with this invention,

Fig. 2 is a rear elevation of the same,

Fig. 3 is a horizontal sectional view of the bolt pulling device,

Fig. 4 is a detail perspective view of the lower portion of the vertically movable lifting bar,

Fig. 5 is a detail sectional view illustrating the manner of mounting the adjustable jaw and the opposite wedges,

Fig. 6 is a detail perspective view of the adjustable aw.

Like numerals of reference designate corresponding parts in the several figures of the drawings.

In the accompanyingdrawings in which is illustrated the preferred embodiment of Specification of Letters Patent.

the invention, the boltand pipe pulling de-4 vice comprises in its construction, a frame or support 1 consisting of a base opposite sides 3 and ay rear supporting portion 4. The base 'is provided with an opening or slot 5 for the reception of an arm V6 extend-v by cleats 8 but any other suitable. form ofv grooves or ways may of course be employed as will be readily understood.- The vertically movable lifting barwhichis provided at its rear face with ratchet. 9 has the arm Patented aan.' 29. '1918. j

Application filed May 23, 1916. Serial No. 99,431; l

6 extending forwardly fromits lower end'- and it is a pted to be raised Vby being alternately engaged by a pair ofpawls `or dogs 1() and 11. The pawls or dogslO and 11 which are arranged at an inclination are pivoted at their lower-.ends at -12 and 13 to an operatinglever 14 at the ,inner and 'outersides of the pivot orv fulcrum point 15' of the same and the said operating lever is pivoted adjacent to its innervend between projecting ears or lugs 17 of the rear Supporting por l tion 4 of the frame or support 1. The rear supporting portion 4./of'the frame or supvv The arm 6 which extends horizontally from the lifting bar or member 7 is provided with a substantially rectangular opening 18 and it has a fixed jaw 19 located at the inner end of the opening and coperating-with an adjustable jaw 20 which is movable toward and from the fixed aw 19. The jaws are provided at their engaging faces with horizontal teeth or serrations to en able them to securely grip a pipe, rod or other object operated on and the adjustable jaw is preferably provided with a rounded engaging face 21 and it has upper and lower horizontally projecting lugs 22 located at the upper and lower faces of the justable jaw which is adapted to engage a is adjusted by means of al horizontally disposed screw 23 piercing the outer portion of the arm 6 centrally of the same and in order Vto relieve the screw the arm is equipped with a pair of wedges 24 located at opposite sides of the screw and adapted to cause the adjustable jaw to grip the bolt, pipe, rod or the like and they obviate any liability of the threads of the screw Vbeing stripped therefrom during' the operation of the device. The frame or support is designed to be equipped at opposite sides with chains 26 hav-ing terminal hooks,l 27 to enable the frame or support to be mounted upon' a rail or secured in any positionv for operating on bolts or the like. Vhe'n the jaws are engaged with a bolt, pipe, rod or the like, the lever is adapted to be operated to move the liftingbar or member upwardly or outwardly and it will be clear that pipes, rods andthe like will be successively moved upward or outward With comparative ease. The lever lel'may be equipped in' its oute'r end with a socket 29 to enable a handle 30 of any desired length to be employed for operating the device.

What is claimed is v l. A device of the class describedincluding a frame having' spaced guides, a lifting bar slidable in theguides and provided with a projecting arm having an opening, said arm being'also provided atthe inner end of the opening with a 'relatively fixed jaw, a horizontally adjustable jaw slidably mounted in theopening at theouter portion thereof for inward and outward adjustment and nasa-,oel

coperating with the fixed jaw, a centrally arranged adjusting screw mounted on the said arm and arranged to move the adjust* able jaw inwardly and a pair of wedges located in the' opening of the said arm at opposite sides of the screw and. movabley upwardly and downwardly independently of the adjustable jaw and adapted to relieve the screw of strain.

2. A device of the class described including a frame, a vertically movable lifting bar guided in the' frame andprovided at the lower portion with an arm having an opening, said liftingbar being also provided at the inner end' of the opening with a rela'- tively fixedA jaw, a horizontally adjustable jaw operating in and extending through the opening: of the saidarm and provided above and below the same with lugs arranged in pairs and slidably interlocking the adjustable jaw with the arm and preventing vertical movement when the ad'- justable jaw is in its normal engaging position andpermitting the removal .of the adjustable jaw from the opening when the saidadjustable jaw is-turncd out of such )osition an ad'ustin screw mounted in the'k 1 a outer end of the arm and engagingthe ad'- justablej aw for moving the same inwardly,

and an independently movable Wedge interposed between'jthe adjustable javi7 and the outer end=wall of the saidl opening.

In testimony whereof I aiiX my signature in presence of two witnesses. Y

l ALBERT L. ANDREWS'.

`Witnessesz f E. SNeoir, G. Snoek.

Centeae thiapatemt'mey beebtained for five cents each" byaddi'essinthe Commissioner er1 Patente# Washington, D.' D. 

